OS X El Capitan

OS X El Capitan (version 10.11) is the twelfth <a href="/facts/Software_versioning/EP8VXAUU">major release</a> of <a href="/facts/MacOS/Y93vVpTm">macOS</a> (named OS X at the time of El Capitan's release), <a href="/facts/Apple_Inc./oTJYta3k">Apple Inc.</a>'s desktop and <a href="/facts/Server_(computing)/dEaYFD7r">server</a> operating system for <a href="/facts/Macintosh/8GhnXTK0">Macintosh</a>. It focuses mainly on performance, stability, and security. Following the <a href="/facts/California/zLW2vdQJ">California</a> location-based naming scheme introduced with <a href="/facts/OS_X_Mavericks/5xavJXqv">OS X Mavericks</a>, El Capitan was named after the famous eponymous <a href="/facts/El_Capitan/euzq3eMf">rock formation</a> in <a href="/facts/Yosemite_National_Park/KBujLcNB">Yosemite National Park</a>. El Capitan is the final version to be released under the name OS X. OS X El Capitan received far better reviews than Yosemite.
The first beta of OS X El Capitan was released to developers shortly following the <a href="/facts/WWDC_2015/hEjVWkoo">WWDC</a> keynote on June 8, 2015. The first public beta was made available on July 9, 2015. There were multiple betas released after the keynote. OS X El Capitan was released to end users on September 30, 2015, as a free upgrade through the <a href="/facts/Mac_App_Store/uYr7slD4">Mac App Store</a>.
OS X El Capitan is the final version of OS X to support aluminum Macs and <a href="/facts/Xserve/QHnJJtIB">Xserve</a>, as its successor <a href="/facts/MacOS_Sierra/jV5ocHbo">macOS Sierra</a> is incompatible with the mid-2007 and final models of these products.

OS X El Capitan open-in-new

OS X El Capitan